maggot



2 Sheets-Sheet 1.

(No Model.)

J. S.-1VIAOOOY. ART OF AND MACHINERY FOR DRESSING STONE.

,2'72. Patented Nov. 6, 1895.

AM DREW iGflMlAM, PHOTO-LITHO.WASHIN5TDN.D C

sheetssneet' 2.

v J. s. MACGOY. ART OF AND MACHINERY FOB DRESSING STONE.

(No Model.)

Patented-Nov. 5, 1895.

UNITED ,STAT S PATENT OFFICE.

Y JAMES S. MACCOY, OF NEWV YORK, N. Y.

ART OF AND MACHINERY FOR DRESSING STONE.

SPECIFICATION forming part of Letters Patent No. 549,272, dated November5, 1895.

Application filed Iuly 28, 1894. Serial No. 518,807. (No model.)

To all whom it may concern.-

Be it known that I, J AMES S. MAoOoY, of the city and county of NewYork, in the State of New York, have invented a new and usefulImprovement in the Art of and Machinery for Dressing Stone, of which thefollowing is a specification.

I will now proceed to describe my inven tion, with reference to theaccompanying drawings, of a stone-dressing machine, and will afterwardpoint out in claims the novelty of the improvement. V

Figure 1 represents a side elevation of the machine. Fig. 2 represents aplan of the same with all the parts represented above the line a; as inFig. 1 omitted. Fig. 3 represents a vertical section of the pneumatictool used in said machine and a portion of the carrier to which it isattached. horizontal section in the line y y of Fig. 3. Fig. 5represents a vertical section'of the upper part of the column on whichthe toolcarrier is supported. Figs. 6 and 7 represent part of thecarrier with the tool at different angles. Fig. 8 represents somedetails which will be hereinafter explained. Fig. 9 is a side view of acutter having several parallel cutting-edges for producing a multiplecut.

Similar letters of reference designate corresponding parts in all thefigures.

A is the base, upon which is erected a hollow cylindrical column orstandard B, the said base being on wheels 0 for the purpose of enablingit to be moved easily from place to place.

D a a designate the tool-carrier, consisting of two parallel bars D andspacing pieces or blocks a a, secured between them to hold them at sucha distance apart that they may move vertically or horizontally on thestandard B.

F c designate a frame in which the toolcarrier works, consisting of tworings F, arranged on opposite sides of the standard B, and tool-carrierand shafts c, which serve to hold the rings at the proper distance apartfor the tool-carrier to move between them, and serve also as the axlesfor rollers G G and H II, of which there are four pairs, viz: two upperand lower pairs G G, spaced to fit and run up and down upon oppositesides of the standard I3, and front and rear pairs Fig. l represents a HII so spaced that the tool-carrier may run back and forth between them.The upper and lower rollers G G are grooved to fit the standard, and thefront and rear rollers 11 H are flanged on both sides to fit within theside bars D of the tool-carrier.

I is a revolving cap or collar fitted with a ball-bearing to the top ofthe standard 13. The cap or collar I carries two pulleys J J, over whichruns a rope or chain K, the opposite ends of which are connected withthe front and rear parts of the carrier-frame F c. From a loop or bightof this rope or chain depending between the pulleys a weight L issuspended within the hollow standard 13, the said weight serving as acounterbalance to the tool-carrier D, the power-operated tool E i h, andthe carrier-frame F 0.

One end of the rope or chain K is fastened permanently to thecarrier-frame F c, and the other end is attached to a windlassf, theaxle of which turns in bearings in the carrier-frame and is providedwith a hand-crank g, by which the rope or chain may be lengthened orshortened between the carrier-frame and the weight to vary the limit ofplay of the carrierframe and the upward and downward movement of thecarrier-frame and tool-carrier upon the hollow standard B.

The carrier-frame and tool-carrier are free to be laterally turned uponthe support or standard in such manner as to permit the tool to operateupon work within the radius of the bars D of the tool-carrier withoutmoving the whole machine, while the counterbalancing of thecarrier-frame, carrier, and tool by the weight L allows the tool to beeasily raised and lowered by the operator, according to the height ofthe work.

The pneumatic tool which I have selected for the illustration of myinvention consists in part of a cylinder E, to the lower end of which isfitted a chisel or cutter h, and which contains a piston i, which ismade to operate as a hammer by the induction and eduction of compressedair above and below the said piston alternately, the said pistoncontaining also a valve for controlling said induct-ion of compressedair to the cylinder E from the induction-pipe p, and also forcontrolling the exhaust from the said cylinder through the exhaust-pipep. The said tool is represented as attached to the spacing-block a ofthe toolcarrier, the said block being pivoted at its ends, as shown at7, into the side bars D of the carrier. The attachment of the cylinderto said block is made by a pivot 10. By this double pivotal attachment'7 10 the tool is made adjustable at any angle to the tool-car riereither with respect to the length or breadth of the latter, as may beunderstood by reference to Figs. 6 and 7 of the drawings. As thus fardescribed the pneumatic tool constitutes no part of my presentinvention, which so far as it relates to the tool consists in theblast-pipe 19 which is connected with or forms a continuation of thesaid exhaustpipe, and further consists in fitting the cutter ordressing-instrument to the lower head j of the cylinder, whichconstitutes a chuck for the said instrument in such manner that it iscapable of turning freely therein.

The exhaust-pipe p is represented as a piece of flexible tubing whichextends from the exhaust-port of the cylinder to a coupling 12, whichconnects the said pipe with the carrier-frame, and which eouplin g hasconnected with it a cook 13, to which is connected the blast-pipe 13 theend of which is directed, as shown in Fig. 1, toward the point orcuttingedge of the cutter or dressing instrument It and terminates insuch proximity thereto that it will deliver a blast of the exhaust-airupon the stone at the point where the said instrument is in operationand also upon the said instrument itself, thereby blowing away thecuttings of the stone out of the way of said instrument and serving tocool the said instrument.

The cutting or dressing instrument 7L may be a bit, chisel, or cutter ofany known or suitable kind and has a round shank 72.. The lower head jof the cylinder E, which constitutes a chuck for the said cutter, issimply bored with a round bore corresponding in size with the shank ofthe cutter, so that the out ter may be freely turned by the hand of theoperator and its cutting-edge may be directed to produce an aligned cut,notwithstanding that the tool moves both to and from and also around thecentral support, and. therefore in curved lines. This is especiallyimportant in the use of cutters having several parallel cuttin g-edgesfor producing a multiple cut. Such a tool is represented in Fig. 9,consistingof a stock in which are a number of parallel blades.

In the operation of this machine the cutter 72, may be held by one handof the attendant and moved by him over the surface of the stone in anyand every direction desired, while at the same time keeping its edge'true to any desired line without regard to the direction in which thetoolcarrier points or in which the tool is moved over the stone, thismovement of the tool being permitted by the movement of the frame F cand carrier 1) a (0 around and up and down the standard and by thelongitudinal movement of the said carrier in the said frame, and in thesaid movement the cutter is accompanied or followed by the blast-pipe,which, being connected with the cutter, always supplies the blast of airat the point required.

For some kinds of dressing, in which there is used as thecuttinginstrument a cross-bit, such as is shown in place in Fig. 1, theblastpipe p maybe directed to one side of the center of the bit, asshown in Fig. 8, which represents an inverted plan view of such a bitand of the end of the blast-pipe." By this arrangement the blast may bemade to give a rotary motion to the bit in the chuck. \Vhen such a bitso rotated is used, the operator, instead of taking hold of the bit todirect it, may take hold of the tool-carrier somewhere near the tool.

In that part of my invention which consists in subjecting thecutting-instrument and the surface to be cut to the action of a blast, Ido not confine myself to the use of the blast of air exhausted from thecylinder of a pneumatic tool, as it is obvious that a blast of air fromany source may be employed.

I do not claim as my sole invention either the power-operated hammer ortool, the carrier which carries the said hammer or tool, the frame inwhich the said carrier is operated, the standard on which said framemoves, or the counterbalaneing devices applied to said frame and carrierherein described or the combinations thereof, those being thesubject-matter of application, Serial No. 505,7 O7 for United StatesPatent, filed March 20, 1804, by Frank H. Marsh, George II. \Villiams,and myself.

hat I claim as my invention is 1. The method herein described ofproducing on stone a multiple cut surface in a desired alignment,wherein the cutting instru ment is moved by the hand of the workman anddirected over the stone with its edges in the desired alignment whilethe bodily movement of the said instrument is in curved lines,substantially as herein set forth.

2. In a machine for dressing stone, the combination of a support and atool carrier movable around said support, a reciprocating power-operatedtool attached to said carrier and movable therewith in arcs around saidsupport and a cutter fitted to said tool to turn freely therein that itsedge may be directed in any alignment, substantially as herein setforth.

3. In a machine for dressing stone, the combination of a support and atool carrier movable around said support, a reciprocating power-operatedtool attached to said carrier and movable therewith in arcs around saidsupport and a cutter having several parallel cut-ting edges fitted tosaid tool to turn freely therein that its edges may be directed in anyalignment, substantially as herein set forth.

4:. In a machine for dressing stone, the combination of a pneumatichammer comprising a cylinder and piston and means of admitting steam toand exhausting it from said cylinder for producing the operation of saidpiston, said cylinder being provided With a chuck for a cuttinginstrument, a carrier for supporting said hammer movably over the stoneto be dressed and a cutting instrument fitted loosely to said chuck andcapable of turning freely therein, substantially as and for the purposeherein set forth.

5. In a stone dressing machine, the combination With a chuck and a crossbit fitted to rotate freely therein, a blast pipe directed toward saidcutter at one side of the center thereof and means of supplying air tosaid blast pipe for producing the rotary motion of 15 the said cutter,substantially as herein set forth.

